I just changed the front pads and rotors on my 03 Dodge Ram with Cummins and six speed manual. In looking at my log book it appears they were the factory originals. 173,000 miles. The rears were replaced at about 120,000 (I did not check, that is from memory).
Can anybody beat 173,000 miles on pads? ...especially front pads? If you have jake brakes I don't think it will count in this little challenge.
The truck is rarely driven without a trailer of come kind out back and most miles are on the road. It is a formidable tow device.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.

[SIGPIC]
..I also have a 427 Cobra replica with an aluminum chassis.